Oil Pressure Gauge/Oil Pressure Switch Test

With Fuel Thermometer SST 49 0839 285  attached to the oil pressure switch connector and the ignition lock cylinder in the ON position (engine not running), set SST  to infinite resistance. The center line of the pointer should fall on or below the "L" mark.

Short the connector directly to engine ground. The centerline of the pointer should fall slightly above mid-scale.

• If the oil pressure gauge tests within calibration, replace the oil pressure switch.
• If the oil pressure gauge still tests out of calibration, replace the gauge. See SPEEDOMETER/ODOMETER INOPERATIVE .